The files contained in the dataset are the eye-tracking and behavioral data collected for the study titled “Where You Look Matters for Body Perception: Preferred Gaze Location Contributes to the Body Inversion Effect” published in PLoS ONE.

This ReadMe has the following sections to help you understand the data contained within the data files:
(1) Preliminary notes about the data files
(2) Descriptions of the data columns in all of the “headedsampleReport_#of2.xls” and “headlesssampleReport_#of2.xls” files
(3) Numerical coding for conditions in all of the “headedsampleReport_#of2.txt” and “headlesssampleReport_#of2.txt” files
(4) Data columns and data coding in all of the “SubjectNum#*.txt” and “FixSubjectNum#*.txt” files







(1) >>>>—————— Preliminary notes about the data files ——————<<<<

Both “headedsampleReport_#of2.xls” files contain several participants’ gaze sample data from the whole body experimental condition of the free-viewing experiment (Experiment 1).  The gaze sample data included for each trial is limited to that recorded from the onset of the second body stimulus to the participant’s response.

Both “headlesssampleReport_#of2.xls” files contain several participants’ gaze sample data from the headless body experimental condition of the free-viewing experiment (Experiment 1).  The gaze sample data included for each trial is limited to that recorded from the onset of the second body stimulus to the participant’s response.

The data in the “headedsampleReport_#of2.txt” and “headlesssampleReport_#of2.txt” files are equivalent to those in the “headedsampleReport_#of2.xls” and “headlesssampleReport_#of2.xls” files, respectively, except that the text labels for conditions have been re-coded as numbers, the data column labels in the first row have been removed, and data are tab-delimited.  This allows for easier loading and analysis in custom-made scripts or in other software. 

Each “SubjectNum#b.txt” file contains one participant’s behavioral performance data from the whole body experimental condition of the free-viewing experiment (Experiment 1)

Each “SubjectNum#h.txt” file contains one participant’s behavioral performance data from the headless body experimental condition of the free-viewing experiment (Experiment 1)

Each “FixSubjectNum#b.txt” file contains one participant’s behavioral performance data from the whole body experimental condition of the forced fixation experiment (Experiment 2)

Each “FixSubjectNum#h.txt” file contains one participant’s behavioral performance data from the headless body experimental condition of the forced fixation experiment (Experiment 2)

Subject number labels are consistent across all data files.  However the numerical codes for the experimental conditions in the “SubjectNum#*.txt” and “FixSubjectNum#*.txt” files are not equivalent to those in the “headedsampleReport_#of2.txt” and “headlesssampleReport_#of2.txt” files, so check the notes in this readMe to determine the condition codes for each file.








(2) >>>>—————— Descriptions of the data columns in all of the “headedsampleReport_#of2.xls” and “headlesssampleReport_#of2.xls” files ——————<<<<

The “headedsampleReport_#of2.xls” and “headlesssampleReport_#of2.xls” files are the output of a “Sample Report” produced through the EyeLink Data Viewer.  Following are the variables (columns) contained in this output along with descriptions of these variables:

SUBJECTNUM - Subject number label
TRIAL - Trial number in the trial sequence
ORIENTATION - Whether the stimulus was upright or inverted
SAMEDIFF - Whether the pair of stimuli in the trial were identical or different
SIDE - not relevant to this experiment since stimuli were always present in the center
PAIR - The stimulus image pair number
RESPONSE - The number label of the button first pressed in the trial
CORRECTNESS - Correctness of the response (0 = incorrect, 1 = correct)
TIMESTAMP - The time stamp of the sample (in milliseconds from the time the EyeLink tracker was activated)
SAMPLE_INDEX - The index of the sample in the trial
LEFT_GAZE_X - Left eye gaze coordinate along the x axis
LEFT_GAZE_Y - Left eye gaze coordinate along the y axis
RIGHT_GAZE_X - Right eye gaze coordinate along the x axis
RIGHT_GAZE_Y - Right eye gaze coordinate along the y axis
LEFT_IN_BLINK - Whether the left eye is in a blink (0 = no, 1= yes)
LEFT_IN_SACCADE	 - Whether the left eye is in a saccade  (0 = no, 1= yes)
RIGHT_IN_BLINK - Whether the right eye is in a blink (0 = no, 1= yes)
RIGHT_IN_SACCADE - Whether the right eye is in a saccade (0 = no, 1= yes)
IP_DURATION - Duration of the interest period (i.e., ) in milliseconds







(3) >>>>——————  Numerical coding for conditions in all of the “headedsampleReport_#of2.txt” and “headlesssampleReport_#of2.txt” files  ——————<<<<

The data in the “headedsampleReport_#of2.txt” and “headlesssampleReport_#of2.txt” files are equivalent to those in the “headedsampleReport_#of2.xls” and “headlesssampleReport_#of2.xls” files, respectively, except that the text labels for conditions have been re-coded as numbers, the data column labels in the first row have been removed, and data are tab-delimited.  This allows for easier loading and analysis in custom-made scripts or in other software.  The relevant condition labels are re-coded as follows:

UPRIGHT = 1
INVERTED = 2

SAME = 1
DIFFERENT = 2

CENTER = 1

. = 0







(4) >>>>—————— Data columns and data coding in all of the “SubjectNum#*.txt” and “FixSubjectNum#*.txt” files ——————<<<<

Each file is a tab-delimited data file (one for each subject).  No eye-movement measurements are recorded in these files, but they can be used to analyze behavioral performance (e.g. accuracy, d’, reaction time) during the experiment.  To prevent poor quality data from being shared, only those participants not excluded from analysis in the main manuscript are included in this dataset.  Following are the variables (columns) contained in these files along with the numerical codes for different conditions: 

column 1) trial number
2) forced fixation location (only relevant in the forced fixation experiment, i.e., Experiment 2) (0 = torso, 1 = pelvis, 2 = head)
3) orientation of the stimuli (0 = upright, 1 = inverted)
4) whether the pair of stimuli were identical or different (0 = same, 1 = different)
5) The number label of the button first pressed in the trial (0 = no response)
6) correctness of response (0 = incorrect, 1 = correct)
7) reaction time (in milliseconds from the stimulus onset)
8) whether the participant maintained fixation on the forced fixation location (only relevant in the forced fixation experiment, i.e., Experiment 2) (0 = did not, 1 = did maintain fixation)